Hitman 3 Contracts Easter Egg - A Ghost?

1.In the traditons of the trade level enter the building and turn right
2.go in the door and wait for the guard to leave
3.once he leaves and the door closes pick the lock on the door opposite to the one you used to come into the room
4.once you open the door go through the door and look right
5.when you are looking right you will see a corner
6.If you quickly run to the wall you are facing and look left you can see a ghost go through a wall
BONUS:if you pick the lock on the door that the ghost go's and enter the room you can see a murder scene, also if you go into the bathroom and look in the mirror you can see the ghost for about 2 or 3 seconds